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  2. Molar mass - Wikipedia

    en.wikipedia.org/wiki/Molar_mass

    The molecular mass (for molecular compounds) and formula mass (for non-molecular compounds, such as ionic salts) are commonly used as synonyms of molar mass, differing only in units (daltons vs g/mol); however, the most authoritative sources define it differently. The difference is that molecular mass is the mass of one specific particle or ...

  3. Molecular mass - Wikipedia

    en.wikipedia.org/wiki/Molecular_mass

    Molar masses when expressed in g/mol have almost identical numerical values as relative atomic and molecular masses. For example, the molar mass and molecular mass of methane, whose molecular formula is CH 4, are calculated respectively as follows:

  4. Amount of substance - Wikipedia

    en.wikipedia.org/wiki/Amount_of_substance

    The molar mass of a substance depends not only on its molecular formula, but also on the distribution of isotopes of each chemical element present in it. For example, the molar mass of calcium-40 is 39.962 590 98 (22) g/mol, whereas the molar mass of calcium-42 is 41.958 618 01 (27) g/mol, and of calcium with the normal isotopic mix is 40.078(4 ...

  5. Mass fraction (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Mass_fraction_(chemistry)

    The mole fraction can be calculated using the formula = ¯, where is the molar ... where is the molar mass of the component , and ¯ is the ...

  6. Chemical formula - Wikipedia

    en.wikipedia.org/wiki/Chemical_formula

    An example of the difference is the empirical formula for glucose, which is CH 2 O (ratio 1:2:1), while its molecular formula is C 6 H 12 O 6 (number of atoms 6:12:6). For water, both formulae are H 2 O. A molecular formula provides more information about a molecule than its empirical formula, but is more difficult to establish.

  7. Molar mass distribution - Wikipedia

    en.wikipedia.org/wiki/Molar_mass_distribution

    The number average molar mass is a way of determining the molecular mass of a polymer.Polymer molecules, even ones of the same type, come in different sizes (chain lengths, for linear polymers), so the average molecular mass will depend on the method of averaging.

  8. Template:Chem molar mass - Wikipedia

    en.wikipedia.org/wiki/Template:Chem_molar_mass

    This template calculates the molecular mass (or molar mass) ... Use chemical symbols to compose the molecular formula: {{Chem molar mass|H=2|O=1}} (for H 2 O) → 18. ...

  9. Molar mass constant - Wikipedia

    en.wikipedia.org/wiki/Molar_mass_constant

    The molar mass constant, usually denoted by M u, is a physical constant defined as one twelfth of the molar mass of carbon-12: M u = M(12 C)/12. [1] The molar mass of an element or compound is its relative atomic mass (atomic weight) or relative molecular mass (molecular weight or formula weight) multiplied by the molar mass constant.